Two beams of light having intensities I and 4 I interfere to produce a fringe pattern on a screen. The phase difference between the two beams are π /…

Two beams of light having intensities I and $\displaystyle 4$ I interfere to produce a fringe pattern on a screen. The phase difference between the two beams are $\displaystyle \pi / 2$ and $\displaystyle \pi / 3$ at points $\displaystyle A$ and $\displaystyle B$ respectively. The difference between the resultant intensities at the two points is $\displaystyle x I$. The value of $\displaystyle x$ will be \_\_\_\_.